I have a gorgeous freebie today which was created by Szymon Kubicki. It’s a free 3D model of a Brabham automobile! Brabhams have an incredible and illustrious history and I recommend you do some research to learn about them. Super interesting! Please follow Szmon on his Behance and give him some love!
The download includes a .fbx file. This model is untextured so you can detail it however you want. It does, however, have a folder full of the stickers, decals, tire textures etc. for you to use. If you have questions you can hit up Szymon about it. Good luck and enjoy the model!